Hi So I Had My Period Last Week My Periods

Hi so I had my period last week my periods are always 7 days always and it always takes a pause on the 4th day. Sorry for graphic detailz.... but on the 4th day my and m husband were horny and had unprotected sex yes he came inside me. After a few hours I went to pee there was little bit dripping out. Then next day my period didn't come back my pad had brown blood and them completely stopped
Should I be worried is it possible to be pregnant?